Morongo Valley Weather in September
Average highs run from 92°F on September 1 to 83°F on September 30, and lows from 70°F to 62°F. Normal precipitation for the month is 0.17 in over about 1 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 88°F
- Average low
- 66°F
- Precipitation
- 0.17 in
- Record high
- 122°FSep 5, 2020
- Record low
- 56°FSep 30, 2019
- Chance of a freeze
- 0%
- Days of 90°F or more
- 16.0
- Daylight
- 12 h 52 min to 11 h 52 min
- Cloud cover
- 18%
- Humidity
- 30%
- Dew point
- 39°F
- Wind
- 6.7 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 92°F | 70°F | 115°F 2007 | 63°F 1999 | 4% | 0% |
| Sep 2 | 92°F | 70°F | 113°F 2010 | 65°F 1999 | 4% | 0% |
| Sep 3 | 92°F | 69°F | 117°F 2010 | 64°F 1999 | 4% | 0% |
| Sep 4 | 92°F | 69°F | 116°F 2020 | 63°F 2000 | 4% | 0% |
| Sep 5 | 91°F | 69°F | 122°F 2020 | 65°F 2016 | 4% | 0% |
| Sep 6 | 91°F | 69°F | 120°F 2020 | 67°F 2016 | 4% | 0% |
| Sep 7 | 91°F | 69°F | 112°F 2011 | 69°F 2001 | 5% | 0% |
| Sep 8 | 91°F | 68°F | 116°F 2018 | 67°F 2010 | 5% | 0% |
| Sep 9 | 90°F | 68°F | 115°F 2023 | 63°F 2010 | 5% | 0% |
| Sep 10 | 90°F | 68°F | 113°F 2024 | 63°F 2010 | 5% | 0% |
| Sep 11 | 90°F | 68°F | 112°F 2009 | 63°F 2005 | 5% | 0% |
| Sep 12 | 89°F | 67°F | 113°F 2021 | 61°F 2005 | 5% | 0% |
| Sep 13 | 89°F | 67°F | 112°F 2021 | 59°F 2005 | 5% | 0% |
| Sep 14 | 89°F | 67°F | 110°F 2000 | 61°F 2005 | 5% | 0% |
| Sep 15 | 88°F | 67°F | 112°F 2000 | 60°F 2016 | 5% | 0% |
| Sep 16 | 88°F | 66°F | 111°F 2020 | 64°F 2005 | 4% | 0% |
| Sep 17 | 88°F | 66°F | 113°F 2020 | 63°F 2007 | 4% | 0% |
| Sep 18 | 87°F | 66°F | 110°F 2020 | 63°F 2005 | 4% | 0% |
| Sep 19 | 87°F | 65°F | 112°F 2000 | 63°F 2010 | 4% | 0% |
| Sep 20 | 86°F | 65°F | 109°F 2012 | 58°F 2004 | 4% | 0% |
| Sep 21 | 86°F | 65°F | 110°F 2003 | 61°F 2007 | 4% | 0% |
| Sep 22 | 86°F | 64°F | 110°F 2003 | 61°F 2007 | 4% | 0% |
| Sep 23 | 85°F | 64°F | 111°F 2002 | 59°F 2007 | 4% | 0% |
| Sep 24 | 85°F | 64°F | 112°F 2024 | 61°F 2017 | 4% | 0% |
| Sep 25 | 85°F | 63°F | 114°F 2024 | 60°F 1998 | 4% | 0% |
| Sep 26 | 84°F | 63°F | 111°F 2009 | 59°F 1998 | 4% | 0% |
| Sep 27 | 84°F | 63°F | 113°F 2024 | 60°F 1998 | 4% | 0% |
| Sep 28 | 84°F | 62°F | 111°F 2024 | 61°F 1998 | 4% | 0% |
| Sep 29 | 83°F | 62°F | 109°F 2024 | 60°F 2007 | 4% | 0% |
| Sep 30 | 83°F | 62°F | 111°F 2020 | 56°F 2019 | 4% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:20 AM, sunset 7:12 PM
- September 30
- sunrise 6:40 AM, sunset 6:32 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00045860 (Morongo Valley N), public domain. Records: NOAA GHCN-Daily, station USW00093138, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.